uPVC replacement windows
Survey and replacement of frames with appropriately specified uPVC windows and glazing.
Window Specialists Cardiff
Find window specialists in Cardiff
Need replacement windows, repairs or glazing upgrades in Cardiff? Describe the property, window type and work required once, then compare window specialists who cover your area.
Genuine verified customer reviews
Up to 3 local responses
You choose who to hire
Looking for a window specialist near you in Cardiff?
Enter the postcode and describe the frame material, approximate number of windows, glazing issue and whether you want repair or replacement. Add photos of the elevations and existing details so suitable Cardiff window specialists can identify security, heritage and Building Regulations requirements.
Common window specialist services
What can window specialists in Cardiff help with?
Choose a professional whose experience matches the scale and practical requirements of your job.
Sash windows
Repair, draught improvement or replacement of sash-style windows where proportions and historic appearance can matter.
Bay windows
Replacement or repair of multi-section bay windows where angles, support and access need careful measurement.
Blown double glazing
Replacing failed sealed glass units where condensation appears between panes but the existing frame remains serviceable.
Timber & aluminium windows
Alternative frame systems where appearance, maintenance, slim sightlines or heritage context shape the choice.
Doors, rooflights & glazing
Related glazed doors, rooflights and specialist openings where safety glazing, access and weathering need consideration.
How much do replacement windows cost?
Frame material, size, opening style and access all affect price. Current 2026 UK guidance gives these broad fitted examples:
£350–£600Standard uPVC casement
£600–£1,100uPVC sash window
£1,200–£2,800Bay-window guide
£55–£145Replacement sealed unit
Indicative UK guidance checked August 2026 from MyJobQuote. Cardiff quotes vary with frame material, glass, floor level, access, making good and planning or listed-building constraints.
Compare like for like
Compare the product specification as well as the number of windows
Frame profile, glazing, ventilation, hardware and installation details can differ substantially even when two quotes list the same number of openings.
- List the number, rough size and opening style of each window.
- Say whether whole frames or only sealed glass units are being replaced.
- Mention listed-building or conservation-area status before manufacturing starts.
- Confirm trims, making good, disposal, ventilation and compliance documentation.
Cost sources: MyJobQuote 2026 uPVC window cost guide · MyJobQuote 2026 blown-window repair guide
Cardiff window and heritage context
Replacement windows can sit under both Welsh Building Regulations and Cardiff heritage controls
Cardiff Building Control requires approval for replacement windows where the installer is not using an appropriate self-certification route, while conservation areas, Article 4 directions and listed buildings can separately restrict changes to visible window design.
Non-self-certified replacement windows require Building Regulations approval
Cardiff Council lists replacement windows or doors installed by a person or company that is not FENSA registered among work requiring Building Regulations approval. Ask the installer what self-certification or Building Control route will be used and what certificate you will receive.
Source: Cardiff Council — when Building Regulations approval is needed
Many conservation areas have extra Article 4 controls over windows
Cardiff Council says the city has 27 conservation areas, around 1,000 listed buildings and many Article 4 directions imposing additional controls on minor alterations such as windows. For a protected property, establish whether repair, like-for-like replacement or a consented design is required before ordering frames.
Source: Cardiff Council — conservation of the built environment
Local to Cardiff
Window Specialists covering Cardiff
Window specialists may cover Cardiff by postcode, frame type and project size. Example areas include:
CathaysRoathCantonPontcannaGrangetownLlandaffWhitchurchLlanishen
Photograph the whole elevation as well as the failed unit
A misted double-glazed unit, failing sash, modern uPVC replacement and protected historic window can need completely different solutions. Wide elevation photos help show pattern and character.
Do not order first and check permission later. For conservation-area, Article 4 or listed properties, establish the acceptable design before manufacture; for ordinary replacements, confirm the Building Regulations certification route.
How it works
Describe the windows once, then compare Cardiff specialists
Window count, style, access and heritage status help installers judge product fit and survey requirements.
List the openings
Add the postcode, photos, number and style of windows, floor levels and whether frames or glass units are being replaced.
Hear from suitable specialists
Up to three interested Cardiff window professionals can respond.
Compare product and fitting
Check reviews, frame and glass specification, warranty, installation, making good and permissions.
Before you hire
What should you check before hiring a window specialist?
The right window has to suit the building, perform properly and comply with any approval requirements that apply.
Confirm the full specification
Compare frame profile, opening style, glazing, hardware, ventilation and colour rather than only unit count.
Check permissions before ordering
For listed buildings or controlled conservation areas, establish the approval route before frames are manufactured.
Agree making good and certification
Ask who removes old units, repairs reveals and supplies relevant compliance documentation.
Questions
Window Specialists in Cardiff: common questions
Useful answers before you post the job.
How much do replacement windows cost in Cardiff?
Cost depends on frame material, glazing, size, opening style, access, security specification and whether heritage detailing is required.
Do replacement windows need Building Regulations approval in Cardiff?
They can. Cardiff Council says approval is required where the installer is not using the relevant registered self-certification route.
Can I replace windows freely in a Cardiff conservation area?
Not always. Many Cardiff conservation areas have Article 4 controls affecting window alterations, and listed buildings have separate consent requirements.
What security standard should I consider?
South Wales Police recommends security-accredited replacement windows and identifies PAS 24:2022 as a good standard.
Do I have to hire a window specialist who responds?
No. Up to three interested local professionals can respond and there is no obligation to hire.
Ready to compare window specialists in Cardiff?
Describe the windows, property and required finish once, then compare interested Cardiff window specialists and their quotes.
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